Students will be able to use an area model to solve multiplication problems with a two-digit factor.
Introduction
(10 minutes)
Explain to the class, "Today we are going to practice multiplying larger numbers."
Remind students that one way to think about multiplication is through the context of area.
Review concept of area (area= length x width).
Provide students with an example of area by drawing a rectangle on the board and multiplying to find the area (i.e. 3 x 2 = 6)
Remind students that another way to multiply is to break numbers into smaller parts, or decompose numbers (see resources for additional information about decomposing numbers).
Review the concept of decomposing numbers by place value (i.e. 12 = 10 + 2 or 36 = 30 + 6).
Ask students to decompose a few numbers with a partner and call on students to share answers (i.e. decompose: 82, 17, 24).
Explain to the class, "We are going to use what we know about area and decomposing numbers to multiply two-digit numbers."